KR20200123571A - Apparatus for coupling in front of power amplifiers - Google Patents

Abstract

According to one embodiment of the present invention, a coupling device includes: a common output terminal; first-1, first-2, second-1 and second-2 impedance elements; first and second couplers formed to couple first and second output signals of first and second power amplifiers or first and second return signals of the first and second output signals; first-1 and second-1 switches formed to determine whether to electrically connect the first and second couplers and the first-1 and second-1 impedance elements in accordance with inputted first-1 and second-1 control signals; first-2 and second-2 switches formed to determine whether to electrically connect the first and second couplers and the first-2 and second-2 impedance elements in accordance with inputted first-2 and second-2 control signals; first-3 and second-3 switches formed to determine whether to pass the first and second output signals between the common output terminal and the first and second couplers in accordance with inputted first-3 and second-3 control signals; and first-4 and second-4 switches formed to determine whether to pass the first and second return signals between the common output terminal and the first and second couplers in accordance with inputted first-4 and second-4 control signals. Therefore, the present invention is capable of increasing electrical balance during a feedback procedure of each power amplifier and reducing the number of wires.

Description

Apparatus for coupling in front of power amplifiers

The present invention relates to a coupling device before power amplifiers.

The power amplifier may amplify an input signal of high power having a high frequency and provide it to an antenna. Since the power amplifier has a great influence on the power consumption and performance of the analog communication circuit, it can have improved performance or be used in various communication standards or cope with various communication situations by being combined with a feedback circuit including a means such as a coupler.

Japanese Patent Application Publication No. 2001-217663

An embodiment of the present invention provides a coupling device before power amplifiers.

A coupling device according to an embodiment of the present invention includes a common output terminal; 1-1, 1-2, 2-1 and 2-2 impedance elements; A first coupler configured to couple a first output signal of a first power amplifier or a first return signal of the first output signal; A second coupler configured to couple a second output signal of a second power amplifier or a second return signal of the second output signal; A 1-1 switch configured to determine whether to electrically connect the first coupler and the 1-1 impedance element according to an input 1-1 control signal; A 1-2 switch configured to determine whether to electrically connect the first coupler and the 1-2 impedance element according to the input 1-2 control signal; A 1-3th switch configured to determine whether to pass the first output signal between the first coupler and the common output terminal according to the input 1-3th control signal; A 1-4th switch configured to determine whether to pass the first return signal between the first coupler and the common output terminal according to an input 1-4th control signal; A 2-1 switch configured to determine whether an electrical connection between the second coupler and the 2-1 impedance element is determined according to an input 2-1 control signal; A 2-2 switch configured to determine whether an electrical connection between the second coupler and the 2-2 impedance element is determined according to an input 2-2 control signal; A 2-3rd switch configured to determine whether to pass the second output signal between the second coupler and the common output terminal according to the input 2-3rd control signal; And a 2-4 switch configured to determine whether to pass the second return signal between the second coupler and the common output terminal according to an input 2-4 control signal. Includes.

The coupling device according to an embodiment of the present invention can integrally couple a plurality of output signals and a plurality of return signals of a plurality of power amplifiers, reduce an overall size or number of wires, and can reduce a plurality of power amplifiers. Electrical balance in each feedback process can be improved.

1 is a view showing a coupling device according to an embodiment of the present invention.
2 is a view showing a peripheral structure of the coupling device of FIG. 1.
3A to 3E are views showing a plurality of modes of the coupling device of FIG. 1.
4A to 4C are views showing additional peripheral structures of the coupling device of FIG. 2.

DETAILED DESCRIPTION OF THE INVENTION The detailed description of the present invention to be described later refers to the accompanying drawings, which illustrate specific embodiments in which the present invention may be practiced. It should be understood that the various embodiments of the present invention are different from each other but need not be mutually exclusive. For example, specific shapes, structures, and characteristics described herein may be implemented in other embodiments without departing from the spirit and scope of the present invention in relation to one embodiment. In addition, it is to be understood that the location or arrangement of individual components within each disclosed embodiment may be changed without departing from the spirit and scope of the present invention. Accordingly, the detailed description to be described below is not intended to be taken in a limiting sense, and the scope of the present invention, if properly described, is limited only by the appended claims, along with all scopes equivalent to those claimed by the claims. Like reference numerals in the drawings refer to the same or similar functions over several aspects.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings in order to enable those of ordinary skill in the art to easily implement the present invention.

1 is a view showing a coupling device according to an embodiment of the present invention, Figure 2 is a view showing a peripheral structure of the coupling device of Figure 1, Figures 3a to 3e is a plurality of the coupling device of Figure 1 It is a diagram showing the mode of.

2, the coupling device 100 according to an embodiment of the present invention is electrically connected between the first and second power amplifiers 201 and 202 and the first and second antennas (Antenna1, Antenna2). Can be connected.

The first power amplifier 201 may receive a first input signal TX1 input and may amplify the first input signal TX1 input to generate a first output signal. The second power amplifier 202 may receive a second input signal TX2 input and may amplify the second input signal TX2 input to generate a second output signal.

The first and second input signals TX1 input and TX2 input may have substantially the same frequency as the frequency of signals transmitted and received by the first and second antennas Antenna1 and Antenna2. For example, the first and second input signals TX1 input and TX2 input may be generated as a carrier signal and a baseband signal generated by an oscillator, respectively, are synthesized by a mixer.

For example, the first and second input signals TX1 input and TX2 input may have different frequencies. Accordingly, an electronic device (eg, a portable terminal) including the coupling device 100 may provide communication means of various standards or increase communication data.

For example, the first and second input signals TX1 input and TX2 input may have different powers. Accordingly, one of the first and second power amplifiers 201 and 202 may be designed to be more suited to a relatively large power, and the other may be designed to be more suited to a relatively small power. Accordingly, since the power of the signal radiated from the first and second antennas (Antenna1, Antenna2) may have various sizes according to the communication situation, the electronic device including the coupling device 100 is more adapted to various communication situations. It can provide a means of communication.

As such, an electronic device including the coupling device 100 may have improved communication performance as the number of input signals used increases, and a greater number of power amplifiers may be used.

The first and second power amplifiers 201 and 202 each have a common source (CS) structure or a common gate (CG) structure of at least one semiconductor transistor (eg, BJT, FET, etc.), thereby Signals (TX1 input, TX2 input) can be amplified, and by having a cascode structure or a parallel structure, it can have various frequency characteristics or breakdown voltage characteristics. The bias voltage of the CS structure or the CG structure may affect the amplification gains of the first and second power amplifiers 201 and 202. Accordingly, the amplification gains of the first and second power amplifiers 201 and 202 may be controlled according to the input bias voltage.

Here, the control of the bias voltage may be implemented by the controller 500. The controller 500 may control the amplification gains of the first and second power amplifiers 201 and 202 by providing the first and second amplifier control signals to the first and second power amplifiers 201 and 202. .

The controller 500 may generate first and second amplifier control signals based on a digital or analog signal input from the power detector 550.

In the coupling device 100 according to an embodiment of the present invention, the measured voltage corresponding to the output characteristics of the first and second power amplifiers 201 and 202 at the front end of the first and second power amplifiers 201 and 202 May be generated, and the measured voltage may be provided to the power detector 550. For example, the power detector 550 may generate a digital or analog signal corresponding to the measured voltage and transmit it to the controller 500.

That is, the coupling device 100 according to an embodiment of the present invention may be used as a feedback circuit of the first and second power amplifiers 201 and 202.

In addition, in the coupling device 100 according to an embodiment of the present invention, a first coupling structure corresponding to the first power amplifier 201 and a second coupling structure for the second power amplifier 202 are integrated. Since it may have a structure, it may have a smaller size than the first and second coupling structures are implemented independently.

For example, the coupling device 100 according to an embodiment of the present invention has an integrated structure and thus can be implemented with a smaller number of wires than that of the first and second coupling structures. It can have a size.

For example, since the coupling device 100 according to an embodiment of the present invention has an integrated structure, impedance matching due to an electrical imbalance between the first and second coupling structures can be reduced. And it is possible to more accurately measure the output characteristics of the second power amplifier (201, 202). Accordingly, since the first and second power amplifiers 201 and 202 can be more efficiently controlled, power consumption can be reduced or have improved linearity characteristics (eg, P1dB, IMD3, etc.).

Referring to FIG. 1, the coupling device 100 according to an embodiment of the present invention includes a common output terminal (CPL output), a 1-1 impedance element R1, a 1-2 impedance element R2, and 2-1 impedance element R3, 2-2 impedance element R4, first coupler 151, second coupler 152, 1-1 switch 111, 1-2 switch 121 , The 1-3th switch 131, the 1-4th switch 141, the 2-1 switch 112, the 2-2 switch 122, the 2-3rd switch 132 and the 2-4th It includes a switch 142.

According to the coupling structure of the plurality of switches, the coupling device 100 according to an embodiment of the present invention includes n-1th components corresponding to the first power amplifier 201 and the second power amplifier 202 It is possible to reduce electrical interference between the n-2th components corresponding to.

The first coupler 151 is configured to couple a first output signal of the first power amplifier 201 or a first return signal of the first output signal. The first coupler 151 may be coupled to a first node configured to electrically connect the first transmission input port TX1 input and the first transmission output port TX1 output. The first transmission input port (TX1 input) may be electrically connected to the first power amplifier 201, and the first transmission output port (TX1 output) may be electrically connected to the first antenna (Antenna1).

The second coupler 152 is configured to couple a second output signal of the second power amplifier 202 or a second return signal of the second output signal. The second coupler 152 may be coupled to a second node configured to electrically connect between the second transmission input port TX2 input and the second transmission output port TX2 output. The second transmission input port (TX2 input) may be electrically connected to the second power amplifier 202, and the second transmission output port (TX2 output) may be electrically connected to the second antenna (Antenna2).

For example, the first and second couplers 151 and 152 have a conductive plane adjacent to the first and second nodes and disposed toward the first and second nodes, thereby increasing capacitance together with the first and second nodes. This can be achieved, and the coupling can be implemented according to the capacitance.

The first and second couplers 151 and 152 have first and second powers proportional to the power of the first and second output signals of the first and second power amplifiers 201 and 202 through forward coupling. A measurement voltage can be generated, and a third and fourth measurement voltage proportional to the power of the first and second return signals of the first and second power amplifiers 201 and 202 are generated through reverse coupling. can do.

The power of the first and second output signals can be adjusted according to the control signal control of the controller 500, so that the controller 500 can know the degree of power change of the first and second output signals according to the control signal control. First and second measurement voltages corresponding to the first and second output signals may be provided. Accordingly, the controller 500 may more accurately control the amplification gains of the first and second power amplifiers 201 and 202.

As the first and second return signals are transmitted to the first and second antennas (Antenna1, Antenna2), the first and second output signals are transmitted to the first and second antennas (Antenna1, Antenna2). : 50 Ohm) can be generated based on the degree of match.

Here, the matching degree may correspond to a difference between the impedance of the first and second antennas (Antenna1, Antenna2) and the impedance of a specific transmission line, and the power of the first and second return signals may be greater as the matching degree is lower. have.

Impedances of the first and second antennas (Antenna1, Antenna2) may be variable according to communication conditions, and the controller 500 may receive third and fourth measurement voltages proportional to the first and second return signals. . Accordingly, the controller 500 may more accurately control the amplification gains of the first and second power amplifiers 201 and 202.

The first control principle of the controller 500 according to the first and second output signals and the second control principle of the controller 500 according to the first and second return signals may be different from each other. For example, the first control principle can be implemented by adjusting the bias voltage directly input to the transistor or the voltage of the power supplied to the transistor, and the second control principle is implemented by switching the inductor or capacitor connected to the transistor. May be, but is not limited thereto.

The coupling device 100 according to an embodiment of the present invention includes first and second measurement voltages corresponding to first and second output signals, and third and fourth measurement corresponding to first and second return signals. Since the voltage can be fed back to the controller 500 in an integrated manner, the first and second power amplifiers 201 and 202 can have a reduced size while securing the efficiency.

1-1 switch 111, 1-2 switch 121, 1-3 switch 131, 1-4 switch 141, 2-1 switch 112, 2-2 switch (122), the 2-3rd switch 132, and the 2-4th switch 142, respectively, whether or not the electrical connection between the source terminal and the drain terminal of at least one semiconductor transistor (eg, BJT, FET, etc.) is a gate terminal. It can be configured to be controlled by the voltage of. That is, the 1-1 switch 111, the 1-2 switch 121, the 1-3 switch 131, the 1-4 switch 141, the 2-1 switch 112, the 2- The 2 switch 122, the 2-3rd switch 132, and the 2-4th switch 142 are each of the 1-1, 1-2, 1-3, 1-4, and When the control signals 2-1, 2-2, 2-3, and 2-4 are received, the source terminal and the drain terminal may be electrically connected or separated.

For example, the 1-1, 1-2, 1-3, 1-4, 2-1, 2-2, 2-3 and 2-4 control signals from an external controller It may be provided or may be generated by the controller 500.

For example, the 1-1, 1-2, 2-1, and 2-2 impedance elements R1, R2, R3, and R4 each include a resistor having a resistance value corresponding to a specific transmission line impedance. Can, and can be connected to ground.

The 1-1th switch 111 is configured to determine whether to electrically connect the first coupler 151 and the 1-1th impedance element R1 according to the input 1-1th control signal.

The 1-2 th switch 121 is configured to determine whether to electrically connect the first coupler 151 and the 1-2 th impedance element R2 according to the input 1-2 control signal.

The 1-3th switch 131 is configured to determine whether to pass the first output signal between the first coupler 151 and the common output terminal (CPL output) according to the input 1-3th control signal.

The 1-4th switch 141 is configured to determine whether to pass the first return signal between the first coupler 151 and the common output terminal (CPL output) according to the input 1-4th control signal.

The 2-1 switch 112 is configured to determine whether to electrically connect the second coupler 152 and the 2-1 impedance element R3 according to the input 2-1 control signal.

The 2-2 switch 122 is configured to determine whether to electrically connect the second coupler 152 and the 2-2 impedance element R4 according to the input 2-2 control signal.

The 2-3rd switch 132 is configured to determine whether to pass the second output signal between the second coupler 152 and the common output terminal (CPL output) according to the input 2-3rd control signal.

The 2-4th switch 142 is configured to determine whether to pass the second return signal between the second coupler 152 and the common output terminal (CPL output) according to the input 2-4 control signal.

Accordingly, the coupling device 100 according to an exemplary embodiment of the present invention includes the 1-1 switch 111, the 1-2 switch 121, the 1-3 switch 131, and the 1-4 The first switch 141, the 2-1 switch 112, the 2-2 switch 122, the 2-3 switch 132, and the 2-4 switch 142 are controlled to be electrically connected to each other. And the second output signal and the first and second return signals may be integrally coupled, the n-1th components corresponding to the first power amplifier 201 and the second power amplifier 202 Electrical interference between the n-2th components can be reduced.

Referring to FIG. 3A, the coupling device according to an embodiment of the present invention receives control signals 1-1 and 1-3 so that the switches 1-1 and 1-3 are turned on. 1 An output signal may be coupled to provide a first measured voltage to a common output terminal (CPL output).

Referring to FIG. 3B, the coupling device according to an embodiment of the present invention receives control signals 1-2 and 1-4 so that the switches 1-2 and 1-4 are turned on. A second measured voltage may be provided to a common output terminal (CPL output) by coupling the 1 return signal.

Referring to FIG. 3C, the coupling device according to an embodiment of the present invention receives control signals 2-1 and 2-3 so that the switches 2-1 and 2-3 are turned on. 2 The output signal may be coupled to provide a third measured voltage to a common output terminal (CPL output).

3D, the coupling device according to an embodiment of the present invention receives control signals 2-2 and 2-4 so that the switches 2-2 and 2-4 are turned on. 2 By coupling the return signal, the fourth measured voltage may be provided to a common output terminal (CPL output).

3A and 3B, the switches 2-3 and 2-4 are configured to electrically disconnect between the second coupler and the common output terminal while the first output signal or the first return signal is output from the common output terminal. Control signals 2-3 and 2-4 may be input. Accordingly, a phenomenon in which the first output signal or the first return signal is coupled to the second node to electrically interfere with the second transmission input port (TX2 input) and the second transmission output port (TX2 output) can be suppressed. .

In addition, the 2-1 and 2-2 switches are electrically connected between the second coupler and the 2-1 and 2-2 impedance elements in a state in which the first output signal or the first return signal is output from the common output terminal. The 2-1 and 2-2 control signals may be input to allow the user to do so. Accordingly, a phenomenon in which the first output signal or the first return signal is coupled to the second node to electrically interfere with the second transmission input port (TX2 input) and the second transmission output port (TX2 output) can be further suppressed. have.

3C and 3D, the switches 1-3 and 1-4 electrically disconnect the first coupler and the common output terminal in a state in which the second output signal or the second return signal is output from the common output terminal. Control signals 1-3 and 1-4 may be input. Accordingly, a phenomenon in which the second output signal or the second return signal is coupled to the first node to electrically interfere with the first transmission input port (TX1 input) and the first transmission output port (TX1 output) can be suppressed. .

In addition, the 1-1 and 1-2 switches are electrically connected between the first coupler and the 1-1 and 1-2 impedance elements in a state in which the second output signal or the second return signal is output from the common output terminal. The 1-1 and 1-2 control signals may be input so as to be performed. Accordingly, a phenomenon in which the second output signal or the second return signal is coupled to the first node so that the first transmission input port (TX1 input) and the first transmission output port (TX1 output) are electrically interfered can be further suppressed. have.

Meanwhile, referring to FIGS. 1 and 2, the coupling device 100 according to an embodiment of the present invention includes an input terminal (Aux in), a 3-1 switch 116 and a 3-2 switch 117 It may further include.

The input terminal (Aux in) may receive a signal corresponding to additional feedback information that the controller 500 can use.

The 3-1 switch 116 may be configured to determine whether to electrically connect an input terminal (Aux in) and a common output terminal (CPL output) according to an input 3-1 control signal. Accordingly, a signal input to the input terminal (Aux in) may be transmitted to the common output terminal (CPL output).

Depending on the input terminal (Aux in) and the 3-1 switch 116, the coupling device 100 according to an embodiment of the present invention integrates the first and second output signals and the first and second return signals. While coupling, a signal corresponding to the feedback information may be provided to the controller 500 without additional wiring.

Meanwhile, the 3-2 switch 117 may be electrically connected between the input terminal (Aux in) and the ground, and is turned off when the 3-1 switch 116 is turned on, and the 3-1 switch ( When 116) is in the off state, a 3-2 control signal may be input to be turned on.

For example, the input terminal (Aux in) is configured to be electrically connected to an antenna coupler configured to be coupled to a first or second antenna (Antenna1, Antenna2) electrically connected to the first or second power amplifier (201, 202). I can.

Accordingly, the controller 500 not only can know the impedance of the first or second antennas (Antenna1, Antenna2) through the third and fourth measurement voltages corresponding to the first and second return signals, but also the input terminal (Aux in ), the impedance of the first or second antennas (Antenna1, Antenna2) can be known through the signal input through), so that the impedance of the first or second antennas (Antenna1, Antenna2) can be more accurately determined, and 2 Power amplifiers 201 and 202 can be controlled more efficiently.

3E, switches 1-3, 1-4, 2-3, and 2-4 are electrically connected between the first and second couplers and the common output terminal while the input terminal and the common output terminal are electrically connected. Control signals 1-3, 1-4, 2-3, and 2-4 may be input so as to be disconnected.

Accordingly, since the electrical isolation between the input terminal (Aux in) and the first and second couplers can be further improved, the interference phenomenon between the first, second, third and fourth measured voltages and the input terminal (Aux in) is It can be further suppressed.

Meanwhile, referring to FIG. 2, the first and second antennas Antenna1 and Antenna2 may be configured to transmit and receive signals, respectively.

Therefore, the electronic device including the coupling device 100 according to an embodiment of the present invention is a first and second low-noise amplifiers each amplifying signals received through the first and second antennas (Antenna1, Antenna2), respectively. (401, 402) may be included.

In addition, the coupling device 100 according to an embodiment of the present invention is electrically connected between the first and second low noise amplifiers 401 and 402 and the first and second antennas (Antenna1, Antenna2), and transmits In the mode, only the first and second antennas (Antenna1, Antenna2) and the first and second power amplifiers 201 and 202 are electrically connected, and in the receiving mode, the first and second antennas (Antenna1, Antenna2) and It may include first and second transmission/reception switching switches 301 and 302 configured to electrically connect only between the first and second low noise amplifiers 401 and 402.

Here, the coupling device 100 according to an embodiment of the present invention reduces electrical interference between the first and second low-noise amplifiers 401 and 402 in the reception mode, or the first and second low-noise amplifiers 401, 402) Control signals 1-3, 1-4, 2-3, and 2-4 may be input to reduce noise input to each.

That is, the first and/or second transmission/reception switching switches 301 and 302 of the 1-3, 1-4, 2-3 and 2-4 switches 131, 141, 132, and 142 are in the reception mode. When the control signal is turned off, control signals 1-3, 1-4, 2-3, and 2-4 may be input.

Meanwhile, referring to FIG. 2, the coupling device 100 according to an embodiment of the present invention includes a band path electrically connected between the coupling device 100 and the first and second power amplifiers PA1 and PA2. It may include a filter (BPF). For example, the band pass filter (BPF) may be implemented as a bulk acoustic wave resonator, but is not limited thereto.

4A to 4C are views showing additional peripheral structures of the coupling device of FIG. 2.

Referring to FIG. 4A, the coupling device 100 according to an embodiment of the present invention includes first and second electrically connected coupling devices 100 and first and second power amplifiers PA1 and PA2. It may include 2 impedance networks (Impedance matching 1, Impedance matching 2).

Referring to FIG. 4B, the first and second impedance networks (Impedance matching 1, Impedance matching 2) may be electrically connected between the coupling device 100 and the first and second antennas.

Referring to FIG. 4C, the antenna switch 600 may be electrically connected between the coupling device 100 and the first and second antennas.

In the above, the present invention has been described as an example, but the present invention is not limited to the above-described embodiment, and those of ordinary skill in the field to which the present invention belongs without departing from the gist of the present invention claimed in the claims Anyone can make a variety of variations.

CPL output: common output
R1: 1-1 impedance element
R2: 1-2 impedance element
R3: 2-1 impedance element
R4: 2-2 impedance element
100: coupling device
111: 1-1 switch (switch)
112: 2-1 switch
121: the 1-2 switch
122: 2-2 switch
131: switch 1-3
132: the 2-3rd switch
141: switch 1-4
142: switch 2-4
151: first coupler
152: second coupler
201: first power amplifier
202: second power amplifier
301: first transmission/reception switching switch
302: second transmission/reception switching switch
401: first low noise amplifier
402: second low noise amplifier
500: controller
550: power detector

Claims (7)

Common output stage;
1-1, 1-2, 2-1 and 2-2 impedance elements;
A first coupler configured to couple a first output signal of a first power amplifier or a first return signal of the first output signal;
A second coupler configured to couple a second output signal of a second power amplifier or a second return signal of the second output signal;
A 1-1 switch configured to determine whether to electrically connect the first coupler and the 1-1 impedance element according to an input 1-1 control signal;
A 1-2 switch configured to determine whether to electrically connect the first coupler and the 1-2 impedance element according to the input 1-2 control signal;
A 1-3th switch configured to determine whether to pass the first output signal between the first coupler and the common output terminal according to the input 1-3th control signal;
A 1-4th switch configured to determine whether to pass the first return signal between the first coupler and the common output terminal according to an input 1-4th control signal;
A 2-1 switch configured to determine whether an electrical connection between the second coupler and the 2-1 impedance element is determined according to an input 2-1 control signal;
A 2-2 switch configured to determine whether an electrical connection between the second coupler and the 2-2 impedance element is determined according to an input 2-2 control signal;
A 2-3rd switch configured to determine whether to pass the second output signal between the second coupler and the common output terminal according to the input 2-3rd control signal; And
A 2-4 switch configured to determine whether to pass the second return signal between the second coupler and the common output terminal according to an input 2-4 control signal; Coupling device comprising a.
The method of claim 1,
The first-3 and 1-4 switches are the first to electrically disconnect between the first coupler and the common output terminal in a state in which the second output signal or the second return signal is output from the common output terminal. -3 and 1-4 control signals are input,
The 2nd-3rd and 2nd-4th switches are the second to electrically disconnect between the second coupler and the common output terminal when the first output signal or the first return signal is output from the common output terminal. A coupling device that receives -3 and 2-4 control signals.
The method of claim 2,
The 1-1 and 1-2 switches are between the first coupler and the 1-1 and 1-2 impedance elements in a state in which the second output signal or the second return signal is output from the common output terminal. Receiving the 1-1 and 1-2 control signals to electrically connect
The 2-1 and 2-2 switches are between the second coupler and the 2-1 and 2-2 impedance elements in a state in which the first output signal or the first return signal is output from the common output terminal. A coupling device that receives the 2-1 and 2-2 control signals to electrically connect them.
The method of claim 1,
Input stage; And
A third switch configured to determine whether an electrical connection between the input terminal and the common output terminal is determined according to an input third control signal; Coupling device further comprising a.
The method of claim 4,
The 1-3, 1-4, 2-3, and 2-4 switches are electrically connected between the first and second couplers and the common output terminal while the input terminal and the common output terminal are electrically connected. A coupling device receiving the control signals 1-3, 1-4, 2-3, and 2-4 to disconnect.
The method of claim 1,
The output terminal is a controller configured to output first and second amplifier control signals to the first and second power amplifiers, and a couple configured to output the first output signal, a first return signal, a second output signal, or a second return signal Ring device.
The method of claim 1,
A first transmission/reception switching switch electrically connecting one of the first node coupled to the first coupler and the first power amplifier and between the first node and the first low noise amplifier and electrically disconnecting the other; And
A second transmission/reception switching switch electrically connecting one of the second node coupled to the second coupler and the second power amplifier and between the second node and the second low noise amplifier and electrically disconnecting the other; Including,
The 1-3, 1-4, 2-3, and 2-4 switches are electrically connected between the first node and the first low noise amplifier, or between the second node and the second low noise amplifier. A couple receiving control signals 1-3, 1-4, 2-3, and 2-4 so as to electrically disconnect between the first and second couplers and the common output terminal in an electrically connected state Ring device.

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